debian_rootfs_howto.txt

Debian rootfs
=============

Step 0 - QEMU image for creating rootfs
=======================================

* I used to create images straight on the device, but i dont do it anymore.

* Easiest way to create tarbal and NAND images is in qemu. You can download my
  preinstalled qemu image from:

https://sourceforge.net/projects/qtmoko/files/BuildHost/qtmoko-buildhost.tar.gz/download

* Unpack the tarball, install qemu and run ./start.sh

* After the system is started you can use redirected port to ssh there:

ssh -p 22222 root@localhost

  please note that the root password is empty.

* The system is very minimal, download more packages:

apt-get update
apt-get install multistrap cdebootstrap mtd-utils


Step 1
======

* We will be installing new image to /media/card:

cd ~
cat > multistrap.conf << __END__

[General]
arch=armel
directory=/media/card
cleanup=true
noauth=false
unpack=true
aptsources=Grip Debian
debootstrap=Grip Debian

[Debian]
packages=openssh-server libts-0.0-0 udhcpc iputils-ping liblcms1 libexpat1 omhacks
source=http://cdn.debian.net/debian/
keyring=debian-archive-keyring
suite=wheezy

[Grip]
packages=ifupdown net-tools procps netbase nano module-init-tools wget screen mc wpasupplicant wireless-tools iproute dosfstools fbset rsyslog psmisc iptables dash ttf-dejavu libpng12-0 libjpeg8 libxtst6 sqlite3 ntpdate libmng1 libtiff4 libvorbisfile3 libicu48 gpsd ppp rfkill libasound2 alsa-utils libcap-ng0 libcap2 libsystemd-login0 dbus libgstreamer-plugins-base0.10-0
keyring=emdebian-archive-keyring
source=http://www.emdebian.org/grip
suite=wheezy-grip

__END__

multistrap -f multistrap.conf


Step 1.2 - modified packages
============================

* wpa_supplicant has non upstream patch, bluez and gpsd-clients have useless
  python dependencies. See step 14 and 15 below how they are built.

cd /media/card
wget http://qtmoko.sourceforge.net/debian/gta02/armel/bluez_4.99-2_armel.deb
wget http://qtmoko.sourceforge.net/debian/gta02/armel/gpsd-clients_3.6-4+deb7u1_armel.deb
wget http://qtmoko.sourceforge.net/debian/gta02/armel/wpasupplicant_1.0-3_armel.deb
wget http://ftp.de.debian.org/debian/pool/main/b/bluez/bluez-alsa_4.99-2_armel.deb
mount -t proc none /media/card/proc
chroot /media/card
dpkg -i gpsd-clients_3.6-4+deb7u1_armel.deb
dpkg -i wpasupplicant_1.0-3_armel.deb
dpkg -i bluez_4.99-2_armel.deb
/etc/init.d/bluetooth stop
dpkg -i bluez-alsa_4.99-2_armel.deb
exit
umount /media/card/proc
rm gpsd-clients_3.6-4+deb7u1_armel.deb
rm wpasupplicant_1.0-3_armel.deb
rm bluez_4.99-2_armel.deb
rm bluez-alsa_4.99-2_armel.deb


Step 2
======

* Complete installation. Copy paste below in shell:

mkdir /media/card/mnt/nfs
mkdir /media/card/mnt/p1
mkdir /media/card/mnt/p2
mkdir /media/card/mnt/p3
mkdir /media/card/media/card
echo "neo" > /media/card/etc/hostname
echo "127.0.0.1 neo" >> /media/card/etc/hosts
cat > /media/card/etc/network/interfaces <<__END__
auto lo
iface lo inet loopback
auto usb0
iface usb0 inet static
    address 192.168.0.202
    netmask 255.255.255.0
    network 192.168.0.0
    gateway 192.168.0.200
    up rm /etc/resolv.conf
    up echo nameserver 208.67.222.222 >/etc/resolv.conf
__END__
cat > /media/card/etc/fstab << __END__
rootfs  /                auto    defaults,errors=remount-ro,noatime 0 1
/dev/mmcblk0p1 /media/card auto  defaults                           0 0
/dev/mmcblk0p4 swap      swap    defaults                           0 0
proc    /proc            proc    defaults                           0 0
#tmpfs   /var/cache/apt   tmpfs   defaults,noatime                   0 0
192.168.0.200:/ /mnt/nfs  nfs noauto,nolock,soft,rsize=32768,wsize=32768 0 0
__END__
cat > /media/card/etc/apt/apt.conf.d/99no-install-recommends << __END__
APT::Install-Recommends "0";
__END__
sed -i 's/\(PermitEmptyPasswords\) no/\1 yes/' /media/card/etc/ssh/sshd_config
chroot /media/card /bin/sh -e <<__END_CHROOT__
echo root: root | chpasswd
sed -i 's/root:.*/root:C0XOiCyzQDtsA:14973:0:99999:7:::/' /etc/shadow
__END_CHROOT__


Step 3 - add more package repositories
========================================

echo "deb http://cdn.debian.net/debian wheezy contrib" >> /media/card/etc/apt/sources.list
echo "deb http://cdn.debian.net/debian wheezy non-free" >> /media/card/etc/apt/sources.list
echo "deb http://security.debian.org/ wheezy/updates main contrib non-free" >> /media/card/etc/apt/sources.list
echo "deb http://qtmoko.sourceforge.net/debian/gta02/armel /" >> /media/card/etc/apt/sources.list
echo "deb http://qtmoko.sourceforge.net/apps/all /" >> /media/card/etc/apt/sources.list
echo "deb http://qtmoko.sourceforge.net/apps/armel /" >> /media/card/etc/apt/sources.list

Step 4
======

* Device drivers modules. Most of device drivers are built in kernel, but
  following drivers are exception. g_ether is module so that we can switch
  between mass storage and with ppp_generic saves space so that we fit under
  2MB u-boot limit.

echo g_ether > /media/card/etc/modules
echo ppp_generic >> /media/card/etc/modules
echo bq27x00_battery >> /media/card/etc/modules
echo ohci_hcd >> /media/card/etc/modules
echo ar6000 >> /media/card/etc/modules
echo btusb >> /media/card/etc/modules
echo bluetooth >> /media/card/etc/modules
echo snd-soc-neo1973-wm8753 >> /media/card/etc/modules
echo snd-soc-wm8753 >> /media/card/etc/modules
echo snd-soc-dfbmcs320 >> /media/card/etc/modules
echo snd_soc_s3c24xx >> /media/card/etc/modules


* Edit /media/card/etc/ppp/options and replace "auth" with "noauth"

nano /media/card/etc/ppp/options

* Create /media/card/etc/fb.modes

cat > /media/card/etc/fb.modes << __END__
mode "vga"
    geometry 480 640 480 1280 16
    timings 40816 8 16 2 16 8 2
    rgba 5/11,6/5,5/0,0/0
endmode

mode "qvga"
    geometry 480 640 480 1280 16
    timings 100000 8 16 2 16 8 2
    rgba 5/11,6/5,5/0,0/0
endmode

__END__

  Calling "fbset qvga" and "echo qvga > /sys/class/lcd/jbt6k74-lcd/device/resolution"
  is needed for mplayer in 320x240 with correct colors.

* Configure bluez4 for handsfreee calls, otherwise there is no sounds:

nano /media/card/etc/bluetooth/audio.conf

  and uncomment SCORouting=PCM setting in [General]:

SCORouting=PCM

* Remove alsa-utils init scripts - we dont need them, we set correct alsa
  state ourselves when qtmoko starts up:

chroot /media/card
update-rc.d -f alsa-utils remove
exit


Step 4.5 - make it generate SSH keys on start
=============================================

* SSH server keys are automatically generated during debootstrap. This can be
  security problem if user does not regenerate them. So we delete old keys and
  generate new ones during first boot.

rm /media/card/etc/ssh/ssh_host_*

cat > /media/card/etc/init.d/sshkeysfirstboot << __END__
#!/bin/sh

### BEGIN INIT INFO
# Provides:             sshkeysfirstboot
# Required-Start:       $remote_fs $syslog
# Required-Stop:        $remote_fs $syslog
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    Generate SSH host keys on first boot
### END INIT INFO

dpkg-reconfigure openssh-server
update-rc.d -f sshkeysfirstboot remove
rm -f /etc/init.d/sshkeysfirstboot

__END__

chmod +x /media/card/etc/init.d/sshkeysfirstboot
chroot /media/card
update-rc.d sshkeysfirstboot defaults
exit


Step 4.6 - get rid of getty in inittab
======================================

* TTY's are for logging to console which is useful only if you have USB
  keyboard. So tty respawning is in done in usb-host.sh script and we can
  comment it out from /etc/inittab:

nano /media/card/etc/inittab

  and comment all lines with "respawn:/sbin/getty 38400 ttyX"


Step 4.7 - disable logging by defaults
======================================

* We will have syslogd and klogd disabled by default. If phone works it's not
  needed and it saves flash memory from wearing off. It can be always enabled
  in settings->logging or via devtools menu or with logging_enable.sh script.

chroot /media/card
update-rc.d -f rsyslog remove
exit

Step 4.8 - fix GPRS stability
=============================

* Freerunner has problem with GPRS stability. This will limit max speed on ppp
insterface to 1000 bytes/s, with faster speed calypso crashes. For more info
see http://docs.openmoko.org/trac/ticket/2264

cat > /media/card/etc/ppp/ip-up.d/09lindi-tc << __END__
#!/bin/sh
/sbin/tc qdisc add dev ppp0 root tbf rate 7kbit latency 4500ms burst 3200

__END__

chmod +x /media/card/etc/ppp/ip-up.d/09lindi-tc


Step 5
======

* Set locale to get rid of apt-get warnings

echo "LANG=C" > /media/card/etc/default/locale
echo "LC_ALL=C" >> /media/card/etc/default/locale

* Fix incompatible libts version

cd /media/card/usr/lib
ln -s libts-0.0.so.0 libts-1.0.so.0

* Remove .udev dir, that confuses udev. This dir is here after instalation and
  causes some error/warnings during init. Not sure what's the exact problem.

cd /media/card/dev
rm -rf .udev

* Remove udev from startup scripts, we have devtmpfs in kernel and it's faster:

chroot /media/card
update-rc.d -f udev-mtab remove
update-rc.d -f udev remove
exit

* Remove /etc/network/run and do make dir /etc/network/run
  Otherwise fstab mounting will fail for this directory

rm /media/card/etc/network/run
mkdir /media/card/etc/network/run

Step 6.5 - configure gpsd
=========================

* We use gpsd and it has to be configured for Freerunner:

nano /media/card/etc/default/gpsd

* Make sure you have these values:

START_DAEMON="true"
DEVICES="/dev/ttySAC1"
GPSD_OPTIONS="-b"

Step 7.5 - dash
===============

* For faster boot (~15s) and more memory (+1MB) we use dash instead of bash.

cd /media/card/bin/
rm sh
ln -s dash sh

Step 8 - install QtMoko
=======================

* I use qemu armel host for building qtmoko package. It should be as simple as

git checkout v58
dpkg-buildpackage

* Note that you may need to install some dependencies before building:

apt-get install libX11-dev libXext-dev libXtst-dev libasound2-dev libdbus-1-dev libts-dev libbluetooth-dev

...and checkout git submodules as it's necessary to place qt sources into qtmoko/qtopiacore/qt/:

git submodule update --init

* Please note that releases are made from translations branch so that we have
  all languages.

* Now upload the package to sourceforge. In filezilla connect to sourceforge
  sftp and upload it to /home/project-web/qtmoko/htdocs/debian

* Install it

chroot /media/card/
wget http://qtmoko.sourceforge.net/debian/gta02/qtmoko-neo_58-1_armel.deb
dpkg -i qtmoko-neo_58-1_armel.deb
update-rc.d qtmoko-neo defaults
rm qtmoko-neo_58-1_armel.deb
exit
killall qpe.sh                  # recent versions start qtmoko after install, so kill it
rm -rf /media/card/home/root/*  # remove all stuff created by qpe

Step 8.1 - install mokofaen theme
=================================

* Mokofaen is now default theme for qtmoko - but it's not part of qtmoko deb
  package, so that user can uninstall it to save space. So install mokofaen:

cd /media/card
wget http://qtmoko.sourceforge.net/apps/all/qtmoko-theme-mokofaen_3-2_all.deb
chroot /media/card/
dpkg -i qtmoko-theme-mokofaen_3-2_all.deb
rm qtmoko-theme-mokofaen_3-2_all.deb
exit

Step 8.2 - some more alarm and ringtones
========================================

mkdir -p /media/card/home/root/Documents
cd /media/card/home/root/Documents
wget https://github.com/radekp/qtmoko/raw/master/src/applications/clock/sounds/Alarm_Beep_01.ogg
wget https://github.com/radekp/qtmoko/raw/master/src/applications/clock/sounds/Alarm_Beep_02.ogg
wget https://github.com/radekp/qtmoko/raw/master/src/applications/clock/sounds/Alarm_Beep_03.ogg


Step 9 - Linux kernel
=====================

* Sources for qtmoko are on github:

http://github.com/radekp/linux-2.6/

* Checkout branch for your qtmoko version:

git checkout v2.6.39-gta02-qtmoko-v58

* Create package in buildhost:

cd linux-2.6
dpkg-buildpackage

* You should remove .git while building the package so that the tar with
  sources is not that big. The package to sourceforge.

* Install kernel image:

chroot /media/card
wget http://qtmoko.sourceforge.net/debian/gta02/linux-image-2.6.39-qtmoko-gta02_58-1_armel.deb
dpkg -i linux-image-2.6.39-qtmoko-gta02_58-1_armel.deb
rm linux-image-2.6.39-qtmoko-gta02_58-1_armel.deb
exit

* Create boot args and symlink for qi:

cd /media/card/boot
echo "console=tty0 loglevel=3 rootwait" > append-GTA02
ln -s uImage.bin uImage-GTA02.bin

Step 9.1 - Linux kernel cross compiling - not using anymore
===========================================================

* If you want to cross compile kernel and make uboot image on PC:

make CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- ARCH=arm gta02_defconfig
make -j8 CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- ARCH=arm uImage
make -j8 CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- ARCH=arm modules
make CROSS_COMPILE=/usr/bin/arm-linux-gnueabi- ARCH=arm modules_install INSTALL_MOD_PATH=GTA02


Step 9.2 - import QtMoko debian repository public keys
======================================================

* We use secure apt and we need keys for QtMoko repositories:

cd /media/card
wget https://github.com/radekp/qtmoko/raw/master/dist/qtmoko-pubring.gpg
chroot /media/card
apt-key add /qtmoko-pubring.gpg 
rm qtmoko-pubring.gpg
exit

Step 9.5 - remove bash history
==============================

* Remove .bash_history created during install

rm -f /media/card/root/.bash_history

Step 9.6 - setup default DNS
============================

* So that internet works on neo, DNS used during installation is not working
  e.g. when installing from qemu:

cat > /media/card/etc/resolv.conf <<__END__
nameserver 8.8.8.8
__END__


Step 9.9 - enable ssh access just on usb
========================================

* SSH root access can be dangerous on wifi or on GPRS, so enable it only on usb0

echo "# Enable ssh access just on usb" >> /media/card/etc/rc.local
echo "ip6tables -A INPUT ! -i usb0 -p tcp --dport 22 -j REJECT --reject-with tcp-reset; iptables -A INPUT ! -i usb0 -p tcp --dport 22 -j REJECT --reject-with tcp-reset" >> /media/card/etc/rc.local

* Manually edit /media/card/etc/rc.local and move "exit" 0 to the end of file:

nano /media/card/etc/rc.local


Step 10 - release tarball
=========================

* Release tarbals are uploaded to sourceforge dir /home/frs/project/qtmoko/GTA02/

cd /media/card
tar -czvf ../qtmoko-debian-gta02-v58.tar.gz .

Step 11 - make ubifs images
===========================

* Delete contents of boot, because for NAND it's not needed:

rm -rf /media/card/boot/*

* Remove doc and stuff that is not needed and makes NAND image slower:

find /media/card/usr/share/locale/ -type f -exec rm -f '{}' \;
find /media/card/usr/share/doc/ -type f -exec rm -f '{}' \;
find /media/card/usr/share/doc-base/ -type f -exec rm -f '{}' \;
find /media/card/usr/share/info/ -type f -exec rm -f '{}' \;
find /media/card/usr/share/man/ -type f -exec rm -f '{}' \;
rm -rf /media/card/usr/share/sounds/alsa/*
rm -rf /media/card/usr/share/ssh/blacklist*

* We need just 3 fonts

cd /media/card/usr/share/fonts/truetype/ttf-dejavu/
mv DejaVuSansCondensed-Bold.ttf 1
mv DejaVuSansCondensed.ttf 2
mv DejaVuSansMono.ttf 3
rm *.ttf
mv 1 DejaVuSansCondensed-Bold.ttf
mv 2 DejaVuSansCondensed.ttf
mv 3 DejaVuSansMono.ttf

* Trim down midnight commander

mkdir /media/card/usr/share/mc-new
cp /media/card/usr/share/mc/mc.* /media/card/usr/share/mc-new
mkdir /media/card/usr/share/mc-new/skins
cp /media/card/usr/share/mc/skins/default.ini /media/card/usr/share/mc-new/skins
rm -rf /media/card/usr/share/mc/
mv /media/card/usr/share/mc-new /media/card/usr/share/mc

* Strip kernel modules a bit more (saves ~1MB)

find /media/card/lib/modules/2.6.39-qtmoko-v58/ -name *.ko -exec strip -R .not -R .comment --strip-unneeded {} \;


* Edit the mount for root in /media/card/etc/fstab so that it reads:

rootfs  /                auto    defaults,no_chk_data_crc,bulk_read 0 0

* Create config for ubinize and create the resulting image:

cd /media

cat > ubinize.cfg <<__END__
[ubifs]
mode=ubi
image=qtmoko-debian.ubifs
vol_id=0
vol_size=230MiB
vol_type=dynamic
vol_name=om-gta02-rootfs
vol_flags=autoresize
__END__

mkfs.ubifs -r /media/card -o qtmoko-debian.ubifs -x zlib -m 2048 -e 126976 -c 2047
ubinize -o qtmoko-debian-gta02-v58.ubi -m 2048 -p 128KiB -s 2048 -O 2048 ubinize.cfg
rm qtmoko-debian.ubifs

Step 12 - jffs2 image (not using anymore)
=========================================

* Same first 2 steps as with ubi (copy&delete /boot)

* Uncomment the /var/cache/apt mount in /media/card/etc/fstab

* Make jffs2 image:

mkfs.jffs2 --pad=0x700000 -o qtmoko-debian.jffs2 -e 0x20000 -n -d/media/card



Step 12 - qi for booting ubi image
==================================

* Standard qi from openmoko git has jffs2 hardcoded as root file system. If your
  want to use ubi image you need patched qi.

git clone git://github.com/radekp/qi.git
cd qi
git checkout qtmoko-v28
make CROSS_COMPILE=/opt/toolchains/arm920t-eabi/bin/arm-linux- CPU=s3c2442


Step 13 - generate Packages.gz for debian repository
====================================================

* We have debian repository at http://qtmoko.sourceforge.net/debian/ After you
  upload packages there (using filezilla, host is frs.sourceforge.net user is
  radekp,qtmoko and directory is /home/project-web/qtmoko/htdocs/debian) you
  have to generate Packages.gz:

dpkg-scanpackages . /dev/null | gzip -9c > Packages.gz

* For secure apt you need to generate and sign Release file:

apt-ftparchive release . > Release
gpg -abs -o Release.gpg Release


Step 14 - modified wpa_supplicant
==================================

* There is a regression in wpa_supplicant affecting Freerunner. We have to
  install modified version with this patch reverted:

diff --git a/src/drivers/driver_wext.c b/src/drivers/driver_wext.c
index 9fa356b..e44aeac 100644
--- a/src/drivers/driver_wext.c
+++ b/src/drivers/driver_wext.c
@@ -1007,7 +1007,7 @@  int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
 
        /* Not all drivers generate "scan completed" wireless event, so try to
         * read results after a timeout. */
-       timeout = 5;
+       timeout = 10;
        if (drv->scan_complete_events) {
                /*
                 * The driver seems to deliver SIOCGIWSCAN events to notify
  
  For more info check:
    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=679085
    http://w1.fi/bugz/show_bug.cgi?id=456
    http://patchwork.ozlabs.org/patch/167925/

* The modified package is now uploaded with others here:

http://qtmoko.sourceforge.net/debian/gta02/armel/

Step 15 - modified bluez and gpsd-clients
========================================

* These packages in wheezy suck because they add usless python dependencies
  which is ~60MB

* The tricks is that we rebuild them without dependencies:

    apt-get build-dep bluez gpsd-clients
    apt-get source bluez gpsd-clients

* Now edit their debian/control and manually remove dependencies and rebuild
  packages with dpkg-buildpackage

* The modified packages are now uploaded here:

http://qtmoko.sourceforge.net/debian/gta02/armel/


Boot speedup
============

- replacing /bin/sh with dash, speedup 15s

Ideas & TODO
============

- support for dumb batteries as described in mail
  "Document with answers to most popular battery-related questions is ready"
  http://wiki.openmoko.org/wiki/Battery_Questions_and_Answers#So.2C_how_do_i_use_.22dumb.22_batteries_with_my_freerunner.3F
  from Paul Ferster

Creating debian cross compiling toolchain
=========================================

    * Install packages needed for toolchain. Use your phone and existing
      qtmoko-debian rootfs (ideally from chroot over NFS in /root/toolchain on
      your PC). (Havent found xcalibrate pkg, where is it? Is it needed?)

apt-get install libasound2-dev libbluetooth-dev libdbus-1-dev libglib2.0-dev \
    libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libavcodec-dev \
    libswscale-dev libxsettings-client-dev libssl-dev libts-dev \
    libxcomposite-dev libxcursor-dev libxdamage-dev libxfont-dev \
    libxfontcache-dev libxft-dev libxinerama-dev libxi-dev \
    libxmu-dev libxmuu-dev libxp-dev libxrandr-dev libxts-dev libxtst-dev \
    libxxf86dga-dev libxxf86misc-dev libxxf86vm-dev zlib1g-dev \
    build-essential libc6-dev libjpeg-dev libfreetype6-dev libdjvulibre-dev

    * Make directory for your toolchain and copy files from toolchain rootfs:

mkdir -p /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/lib
mkdir -p /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/include

cp -r /root/toolchain/lib /opt/toolchains/arm920t-eabi/arm-linux-gnueabi
cp -r /root/toolchain/usr/lib /opt/toolchains/arm920t-eabi/arm-linux-gnueabi
cp -r /root/toolchain/usr/include /opt/toolchains/arm920t-eabi/arm-linux-gnueabi

    * We will use cross compiler from emdebian project. On PC add emdebian
      repository to your /etc/apt/sources.list

deb http://www.emdebian.org/debian/ lenny main

    * Download needed packages

apt-get update
apt-get -d install libc6-armel-cross libc6-dev-armel-cross binutils-arm-linux-gnueabi gcc-4.3-arm-linux-gnueabi g++-4.3-arm-linux-gnueabi    

    * Unpack toolchain packages

ln -s /opt/toolchains/arm920t-eabi /opt/toolchains/arm920t-eabi/usr
rm -rf /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/include/c++/4.3*

dpkg -x /var/cache/apt/archives/binutils-arm-linux-gnueabi_2.18.1~cvs20080103-7_i386.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/cpp-4.3-arm-linux-gnueabi_4.3.2-1.1_i386.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/gcc-4.3-arm-linux-gnueabi-base_4.3.2-1.1_i386.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/gcc-4.3-arm-linux-gnueabi_4.3.2-1.1_i386.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/g++-4.3-arm-linux-gnueabi_4.3.2-1.1_i386.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/libc6-armel-cross_2.7-18_all.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/libc6-dev-armel-cross_2.7-18_all.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/libgcc1-armel-cross_1%3a4.3.2-1.1_all.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/libstdc++6-armel-cross_4.3.2-1.1_all.deb /opt/toolchains/arm920t-eabi/
dpkg -x /var/cache/apt/archives/libstdc++6-4.3-dev-armel-cross_4.3.2-1.1_all.deb /opt/toolchains/arm920t-eabi/

    * Symlinks

cd /opt/toolchains/arm920t-eabi/lib/gcc/arm-linux-gnueabi/4.3.2
rm libgcc_s.so
ln -s ../../../../arm-linux-gnueabi/lib/libgcc_s.so.1 libgcc_s.so

    * Fix problems with #include_next in stddef and others

cd /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/include/c++/4.3.2
find . -type f -print0 | xargs -0 sed -i 's/#include_next/#include/g'

    * Fix path to toolchain in package config files:

cd /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/lib/pkgconfig
sed -i 's/\/usr/\/opt\/toolchains\/arm920t-eabi\/arm-linux-gnueabi/g' *.pc

    * Make paths relative in libc.so and others:

cd /opt/toolchains/arm920t-eabi/arm-linux-gnueabi/lib
sed -i 's/\/usr\/arm-linux-gnueabi\/lib\///g' *.so

    * Make the toolchain compatible with our old toolchain

cd /opt/toolchains/arm920t-eabi/
ln -s arm-linux-gnueabi arm-angstrom-linux-gnueabi
cd /opt/toolchains/arm920t-eabi/bin/
ln -s arm-linux-gnueabi-gcc-4.3 arm-linux-gcc
ln -s arm-linux-gnueabi-g++-4.3 arm-linux-g++
ln -s arm-linux-gnueabi-ar arm-linux-ar
ln -s arm-linux-gnueabi-strip arm-linux-strip
ln -s arm-linux-gnueabi-ld arm-linux-ld
ln -s arm-linux-gnueabi-nm arm-linux-nm
ln -s arm-linux-gnueabi-objcopy arm-linux-objcopy
ln -s arm-linux-gnueabi-objdump arm-linux-objdump